| 1 | // SplitShape_Presentation.cpp: implementation of the SplitShape_Presentation class. |
| 2 | // Split shape by wire |
| 3 | ////////////////////////////////////////////////////////////////////// |
| 4 | |
| 5 | #include "stdafx.h" |
| 6 | #include "SplitShape_Presentation.h" |
| 7 | |
| 8 | #include <BRepAlgoAPI_Section.hxx> |
| 9 | #include <BRepFeat_SplitShape.hxx> |
| 10 | |
| 11 | #include <BRep_Builder.hxx> |
| 12 | #include <BRepTools.hxx> |
| 13 | #include <gp_Pln.hxx> |
| 14 | #include <Geom_Plane.hxx> |
| 15 | #include <TopExp_Explorer.hxx> |
| 16 | #include <TopoDS_Edge.hxx> |
| 17 | #include <TopoDS.hxx> |
| 18 | #include <TopoDS_Face.hxx> |
| 19 | #include <TopTools_ListOfShape.hxx> |
| 20 | #include <TopoDS_Shell.hxx> |
| 21 | #include <TopTools_ListIteratorOfListOfShape.hxx> |
| 22 | #include <Geom_RectangularTrimmedSurface.hxx> |
| 23 | #include <BRepBuilderAPI_MakeWire.hxx> |
| 24 | #include <TopoDS_Iterator.hxx> |
| 25 | #include <TopoDS_Wire.hxx> |
| 26 | #include <Prs3d_LineAspect.hxx> |
| 27 | #include <Prs3d_Drawer.hxx> |
| 28 | #include <TopLoc_Location.hxx> |
| 29 | #include <BRepOffsetAPI_MakeOffset.hxx> |
| 30 | #include <BRepBuilderAPI_MakePolygon.hxx> |
| 31 | #include <BRepPrimAPI_MakePrism.hxx> |
| 32 | #include <BRepAdaptor_Curve.hxx> |
| 33 | |
| 34 | |
| 35 | // Initialization of global variable with an instance of this class |
| 36 | OCCDemo_Presentation* OCCDemo_Presentation::Current = new SplitShape_Presentation; |
| 37 | |
| 38 | // Initialization of array of samples |
| 39 | const SplitShape_Presentation::PSampleFuncType SplitShape_Presentation::SampleFuncs[] = |
| 40 | { |
| 41 | &SplitShape_Presentation::sample1, |
| 42 | &SplitShape_Presentation::sample2 |
| 43 | }; |
| 44 | |
| 45 | #ifdef WNT |
| 46 | #define EOL "\r\n" |
| 47 | #define DELIM "\\" |
| 48 | #else |
| 49 | #define EOL "\n" |
| 50 | #define DELIM "/" |
| 51 | #endif |
| 52 | |
| 53 | ////////////////////////////////////////////////////////////////////// |
| 54 | // Construction/Destruction |
| 55 | ////////////////////////////////////////////////////////////////////// |
| 56 | |
| 57 | SplitShape_Presentation::SplitShape_Presentation() |
| 58 | { |
| 59 | myNbSamples = sizeof(SampleFuncs)/sizeof(PSampleFuncType); |
| 60 | setName ("SplitShape"); |
| 61 | } |
| 62 | |
| 63 | ////////////////////////////////////////////////////////////////////// |
| 64 | // Sample execution |
| 65 | ////////////////////////////////////////////////////////////////////// |
| 66 | |
| 67 | void SplitShape_Presentation::DoSample() |
| 68 | { |
| 69 | getAISContext()->EraseAll(); |
| 70 | if (myIndex >=0 && myIndex < myNbSamples) |
| 71 | (this->*SampleFuncs[myIndex])(); |
| 72 | } |
| 73 | |
| 74 | ////////////////////////////////////////////////////////////////////// |
| 75 | // Auxiliary functions |
| 76 | ////////////////////////////////////////////////////////////////////// |
| 77 | |
| 78 | Standard_Boolean SplitShape_Presentation::readShell(TCollection_AsciiString& theText) |
| 79 | { |
| 80 | myShell.Nullify(); |
| 81 | TCollection_AsciiString aPath; |
| 82 | aPath = aPath + GetDataDir() + DELIM + "shell1.brep"; |
| 83 | BRep_Builder aBld; |
| 84 | Standard_Boolean isRead = BRepTools::Read (myShell, aPath.ToCString(), aBld); |
| 85 | if (!isRead) |
| 86 | { |
| 87 | theText = aPath + " is not found"; |
| 88 | setResultText(theText.ToCString()); |
| 89 | } |
| 90 | return isRead; |
| 91 | } |
| 92 | |
| 93 | Standard_Boolean SplitShape_Presentation::computeSection |
| 94 | (BRepAlgoAPI_Section& aSecAlgo, |
| 95 | TopoDS_Wire& aSecWire, |
| 96 | TCollection_AsciiString& aText) |
| 97 | { |
| 98 | aText += |
| 99 | " aSecAlgo.Approximation(Standard_True); // approximate new geometries" EOL |
| 100 | " aSecAlgo.ComputePCurveOn1(Standard_True); // pcurves must be computed on shell" EOL |
| 101 | " aSecAlgo.Build();" EOL |
| 102 | " if (!aSecAlgo.IsDone())" EOL |
| 103 | " return;" EOL |
| 104 | " TopoDS_Shape aSection = aSecAlgo.Shape(); // get compound of section edges" EOL EOL |
| 105 | |
| 106 | " // connect section edges to a wire" EOL |
| 107 | " TopTools_ListOfShape aEdges;" EOL |
| 108 | " TopExp_Explorer ex(aSection, TopAbs_EDGE);" EOL |
| 109 | " if (!ex.More()) // is section empty?" EOL |
| 110 | " return;" EOL |
| 111 | " for (; ex.More(); ex.Next())" EOL |
| 112 | " aEdges.Append(ex.Current());" EOL |
| 113 | " BRepBuilderAPI_MakeWire aWMaker;" EOL |
| 114 | " aWMaker.Add(aEdges);" EOL |
| 115 | " if (!aWMaker.IsDone())" EOL |
| 116 | " return;" EOL |
| 117 | " TopoDS_Wire aSecWire = aWMaker.Wire();" EOL EOL; |
| 118 | setResultText(aText.ToCString()); |
| 119 | |
| 120 | // define parameters and perform section |
| 121 | aSecAlgo.Approximation(Standard_True); // approximate new geometries |
| 122 | aSecAlgo.ComputePCurveOn1(Standard_True); // pcurves must be computed on shell |
| 123 | aSecAlgo.Build(); |
| 124 | if (!aSecAlgo.IsDone()) |
| 125 | { |
| 126 | aText += EOL "Error: section algo has failed" EOL; |
| 127 | setResultText(aText.ToCString()); |
| 128 | return Standard_False; |
| 129 | } |
| 130 | TopoDS_Shape aSection = aSecAlgo.Shape(); // get compound of section edges |
| 131 | |
| 132 | // connect section edges to a wire |
| 133 | TopTools_ListOfShape aEdges; |
| 134 | TopExp_Explorer ex(aSection, TopAbs_EDGE); |
| 135 | if (!ex.More()) // is section empty? |
| 136 | { |
| 137 | aText += EOL "Error: no intersection found" EOL; |
| 138 | setResultText(aText.ToCString()); |
| 139 | return Standard_False; |
| 140 | } |
| 141 | for (; ex.More(); ex.Next()) |
| 142 | aEdges.Append(ex.Current()); |
| 143 | BRepBuilderAPI_MakeWire aWMaker; |
| 144 | aWMaker.Add(aEdges); |
| 145 | if (!aWMaker.IsDone()) |
| 146 | { |
| 147 | aText += EOL "Error: connecting of section edges has failed" EOL; |
| 148 | setResultText(aText.ToCString()); |
| 149 | return Standard_False; |
| 150 | } |
| 151 | aSecWire = aWMaker.Wire(); |
| 152 | |
| 153 | return Standard_True; |
| 154 | } |
| 155 | |
| 156 | ///////////////////////////////////////////////////////////////////// |
| 157 | |
| 158 | Standard_Boolean SplitShape_Presentation::splitAndComposeLeft |
| 159 | (const BRepAlgoAPI_Section& aSecAlgo, |
| 160 | const TopoDS_Wire& aSecWire, TopoDS_Shell& aNewShell, |
| 161 | TCollection_AsciiString& aText) |
| 162 | { |
| 163 | aText += |
| 164 | " // initialize splitting algo with the shell" EOL |
| 165 | " BRepFeat_SplitShape aSplitter(myShell);" EOL EOL |
| 166 | |
| 167 | " // add splitting edges" EOL |
| 168 | " TopoDS_Iterator its(aSecWire);" EOL |
| 169 | " for (; its.More(); its.Next())" EOL |
| 170 | " {" EOL |
| 171 | " const TopoDS_Edge& aEdge = TopoDS::Edge(its.Value());" EOL |
| 172 | " // determine an ancestor face of this edge" EOL |
| 173 | " TopoDS_Face aFace;" EOL |
| 174 | " if (aSecAlgo.HasAncestorFaceOn1(aEdge, aFace))" EOL |
| 175 | " aSplitter.Add (aEdge, aFace);" EOL |
| 176 | " }" EOL EOL |
| 177 | |
| 178 | " // perform splitting" EOL |
| 179 | " aSplitter.Build();" EOL |
| 180 | " if (!aSplitter.IsDone())" EOL |
| 181 | " return;" EOL EOL |
| 182 | |
| 183 | " // compose a new shell from the left side faces" EOL |
| 184 | " TopoDS_Shell aNewShell;" EOL |
| 185 | " aBld.MakeShell(aNewShell);" EOL |
| 186 | " const TopTools_ListOfShape& aLF = aSplitter.Left();" EOL |
| 187 | " TopTools_ListIteratorOfListOfShape it(aLF);" EOL |
| 188 | " for (; it.More(); it.Next())" EOL |
| 189 | " aBld.Add (aNewShell, it.Value());" EOL EOL; |
| 190 | setResultText(aText.ToCString()); |
| 191 | |
| 192 | // initialize splitting algo with the shell |
| 193 | BRepFeat_SplitShape aSplitter(myShell); |
| 194 | |
| 195 | // add splitting edges |
| 196 | TopoDS_Iterator its(aSecWire); |
| 197 | for (; its.More(); its.Next()) |
| 198 | { |
| 199 | const TopoDS_Edge& aEdge = TopoDS::Edge(its.Value()); |
| 200 | // determine an ancestor face of this edge |
| 201 | TopoDS_Face aFace; |
| 202 | if (aSecAlgo.HasAncestorFaceOn1(aEdge, aFace)) |
| 203 | aSplitter.Add (aEdge, aFace); |
| 204 | } |
| 205 | |
| 206 | // perform splitting |
| 207 | aSplitter.Build(); |
| 208 | if (!aSplitter.IsDone()) |
| 209 | { |
| 210 | aText += EOL "Error: splitting algo has failed" EOL; |
| 211 | setResultText(aText.ToCString()); |
| 212 | return Standard_False; |
| 213 | } |
| 214 | |
| 215 | // compose a new shell from the left side faces |
| 216 | BRep_Builder aBld; |
| 217 | aBld.MakeShell(aNewShell); |
| 218 | const TopTools_ListOfShape& aLF = aSplitter.Left(); |
| 219 | TopTools_ListIteratorOfListOfShape it(aLF); |
| 220 | for (; it.More(); it.Next()) |
| 221 | aBld.Add (aNewShell, it.Value()); |
| 222 | |
| 223 | return Standard_True; |
| 224 | } |
| 225 | |
| 226 | ////////////////////////////////////////////////////////////////////// |
| 227 | // Sample functions |
| 228 | ////////////////////////////////////////////////////////////////////// |
| 229 | |
| 230 | void SplitShape_Presentation::sample1() |
| 231 | { |
| 232 | ResetView(); |
| 233 | SetViewCenter(60.457558475728, -20.351205260916); |
| 234 | SetViewScale(29.468160110195); |
| 235 | |
| 236 | setResultTitle ("Split shell by plane"); |
| 237 | TCollection_AsciiString aText = |
| 238 | " // define initial shell" EOL |
| 239 | " TopoDS_Shell myShell;" EOL |
| 240 | " // myShell = ...;" EOL EOL |
| 241 | |
| 242 | " // define secant plane" EOL |
| 243 | " gp_Pln aPln(gp_Pnt(65,11,0), gp_Dir(1,-0.1,-0.3));" EOL EOL |
| 244 | |
| 245 | " // make section of myShell by the plane" EOL |
| 246 | " Standard_Boolean performNow = Standard_False;" EOL |
| 247 | " BRepAlgoAPI_Section aSecAlgo (myShell, aPln, performNow);" EOL |
| 248 | ; |
| 249 | setResultText(aText.ToCString()); |
| 250 | |
| 251 | // read shell |
| 252 | if (myShell.IsNull() && !readShell(aText)) |
| 253 | return; |
| 254 | |
| 255 | Handle(AIS_InteractiveObject) aIShell = drawShape (myShell); |
| 256 | if (WAIT_A_SECOND) return; |
| 257 | |
| 258 | // define secant plane |
| 259 | gp_Pln aPln(gp_Pnt(65,11,0), gp_Dir(1,-0.1,-0.3)); |
| 260 | |
| 261 | Handle(Geom_Surface) aPlane = new Geom_Plane(aPln); |
| 262 | aPlane = new Geom_RectangularTrimmedSurface(aPlane,-5.,20.,-13.,13.); |
| 263 | Handle(AIS_InteractiveObject) aIPlane = drawSurface(aPlane); |
| 264 | |
| 265 | if (WAIT_A_LITTLE) return; |
| 266 | |
| 267 | // make section of myShell by the plane |
| 268 | TopoDS_Wire aSecWire; |
| 269 | Standard_Boolean performNow = Standard_False; |
| 270 | BRepAlgoAPI_Section aSecAlgo (myShell, aPln, performNow); |
| 271 | if (!computeSection(aSecAlgo, aSecWire, aText)) |
| 272 | return; |
| 273 | |
| 274 | getAISContext()->Erase(aIPlane); |
| 275 | Handle(AIS_InteractiveObject) aISecWire = drawShape (aSecWire,Quantity_NOC_GREEN,Standard_False); |
| 276 | Handle(Prs3d_LineAspect) aLA = |
| 277 | new Prs3d_LineAspect(Quantity_NOC_GREEN,Aspect_TOL_SOLID,3.); |
| 278 | aISecWire->Attributes()->SetWireAspect(aLA); |
| 279 | getAISContext()->Display(aISecWire); |
| 280 | if (WAIT_A_LITTLE) return; |
| 281 | |
| 282 | aText += |
| 283 | " //aSecWire.Reverse(); // orient wire to have the left side as you need" EOL EOL; |
| 284 | setResultText(aText.ToCString()); |
| 285 | //aSecWire.Reverse(); // orient wire to have the left side as you need |
| 286 | |
| 287 | // split myShell by aSecWire and compose the left side subshell |
| 288 | TopoDS_Shell aNewShell; |
| 289 | if (!splitAndComposeLeft(aSecAlgo, aSecWire, aNewShell, aText)) |
| 290 | return; |
| 291 | |
| 292 | drawShape (aNewShell); |
| 293 | getAISContext()->Erase(aIShell); |
| 294 | getAISContext()->Erase(aISecWire); |
| 295 | } |
| 296 | |
| 297 | ///////////////////////////////////////////////////////////////////// |
| 298 | |
| 299 | void SplitShape_Presentation::sample2() |
| 300 | { |
| 301 | setResultTitle ("Cut hole from shell"); |
| 302 | TCollection_AsciiString aText = |
| 303 | " // define initial shell" EOL |
| 304 | " TopoDS_Shell myShell;" EOL |
| 305 | " // myShell = ...;" EOL EOL |
| 306 | |
| 307 | " // define contour of the hole and its normal direction" EOL |
| 308 | " TopoDS_Wire aCont;" EOL |
| 309 | " gp_Dir aNormal(-0.2, -0.7, 0.4);" EOL |
| 310 | " // aCont = ... ;" EOL EOL |
| 311 | |
| 312 | " // project the contour on the shell along aNormal;" EOL |
| 313 | " // for that create prism from the contour" EOL |
| 314 | " // and find intersection with the shell" EOL |
| 315 | " Standard_Real dist = 8;" EOL |
| 316 | " gp_Vec aPrismVec(aNormal.Reversed().XYZ()*dist*2);" EOL |
| 317 | " BRepPrimAPI_MakePrism aSweeper(aCont,aPrismVec);" EOL |
| 318 | " if (!aSweeper.IsDone())" EOL |
| 319 | " return;" EOL |
| 320 | " TopoDS_Shape aPrism = aSweeper.Shape();" EOL EOL |
| 321 | |
| 322 | " // make section of myShell by the prism" EOL |
| 323 | " TopoDS_Wire aSecWire;" EOL |
| 324 | " Standard_Boolean performNow = Standard_False;" EOL |
| 325 | " BRepAlgoAPI_Section aSecAlgo (myShell, aPrism, performNow);" EOL |
| 326 | ; |
| 327 | setResultText(aText.ToCString()); |
| 328 | |
| 329 | // read shell |
| 330 | if (myShell.IsNull() && !readShell(aText)) |
| 331 | return; |
| 332 | |
| 333 | Handle(AIS_InteractiveObject) aIShell = drawShape (myShell); |
| 334 | if (WAIT_A_SECOND) return; |
| 335 | |
| 336 | // define contour of the hole and its normal direction |
| 337 | TopoDS_Wire aCont; |
| 338 | gp_Dir aNormal(-0.2, -0.7, 0.4); |
| 339 | |
| 340 | Standard_Real dx=2, dy=1.5, aOffValue=1.5; |
| 341 | TopoDS_Wire aPol = BRepBuilderAPI_MakePolygon(gp_Pnt(-dx,-dy,0), gp_Pnt(dx,-dy,0), |
| 342 | gp_Pnt(dx,dy,0), gp_Pnt(-dx,dy,0), |
| 343 | Standard_True); |
| 344 | // transform contour to a needed location |
| 345 | gp_Pnt aOrigin(78,16,10); |
| 346 | gp_Dir aXDir(1, 0, 0); |
| 347 | gp_Ax2 aSystem(aOrigin, aNormal, aXDir); |
| 348 | gp_Trsf aTrsf; |
| 349 | aTrsf.SetDisplacement(gp::XOY(), aSystem); |
| 350 | aPol.Location(TopLoc_Location(aTrsf)); |
| 351 | BRepOffsetAPI_MakeOffset aOffAlgo (aPol, GeomAbs_Arc); |
| 352 | aOffAlgo.Perform (aOffValue); |
| 353 | aCont = TopoDS::Wire(aOffAlgo.Shape()); |
| 354 | |
| 355 | Handle(AIS_InteractiveObject) aICont = drawShape (aCont); |
| 356 | if (WAIT_A_SECOND) return; |
| 357 | |
| 358 | // project the contour on the shell along aNormal; |
| 359 | // for that create prism from the contour |
| 360 | // and find intersection with the shell |
| 361 | Standard_Real dist = 8; |
| 362 | gp_Vec aPrismVec(aNormal.Reversed().XYZ()*dist); |
| 363 | BRepPrimAPI_MakePrism aSweeper(aCont,aPrismVec); |
| 364 | if (!aSweeper.IsDone()) |
| 365 | { |
| 366 | aText += EOL "Error: sweeping algo has failed" EOL; |
| 367 | setResultText(aText.ToCString()); |
| 368 | return; |
| 369 | } |
| 370 | TopoDS_Shape aPrism = aSweeper.Shape(); |
| 371 | |
| 372 | Handle(AIS_InteractiveObject) aIPrism = drawShape(aPrism, Quantity_NOC_LEMONCHIFFON3); |
| 373 | if (WAIT_A_LITTLE) return; |
| 374 | |
| 375 | // make section of myShell by the prism |
| 376 | TopoDS_Wire aSecWire; |
| 377 | Standard_Boolean performNow = Standard_False; |
| 378 | BRepAlgoAPI_Section aSecAlgo (myShell, aPrism, performNow); |
| 379 | if (!computeSection(aSecAlgo, aSecWire, aText)) |
| 380 | return; |
| 381 | |
| 382 | aText += |
| 383 | " aSecWire.Reverse(); // orient wire to have the left side as you need" EOL EOL; |
| 384 | setResultText(aText.ToCString()); |
| 385 | //aSecWire.Reverse(); // orient wire to have the left side as you need |
| 386 | // get an edge from the initial contour and |
| 387 | // determine the corresponding projection edge from the section wire; |
| 388 | // check orientations of their first derivatives |
| 389 | TopoDS_Shape aEdgeP, aEdge1, aFace, aEdge2; |
| 390 | TopoDS_Iterator it(aPol); |
| 391 | aEdgeP = it.Value(); |
| 392 | aEdge1 = aOffAlgo.Generated(aEdgeP).First(); |
| 393 | aFace = aSweeper.Generated(aEdge1).First(); |
| 394 | for (it.Initialize(aSecWire); it.More() && aEdge2.IsNull(); it.Next()) |
| 395 | { |
| 396 | TopoDS_Shape aF; |
| 397 | if (aSecAlgo.HasAncestorFaceOn2(it.Value(),aF) && aF.IsSame(aFace)) |
| 398 | aEdge2 = it.Value(); |
| 399 | } |
| 400 | if (aEdge2.IsNull()) |
| 401 | { |
| 402 | aText += EOL "Error: cannot orient projected contour due to" EOL |
| 403 | "failure restoring history of modification" EOL; |
| 404 | setResultText(aText.ToCString()); |
| 405 | return; |
| 406 | } |
| 407 | BRepAdaptor_Curve aC1(TopoDS::Edge(aEdge1)), aC2(TopoDS::Edge(aEdge2)); |
| 408 | gp_Pnt p1, p2; |
| 409 | gp_Vec v1, v2; |
| 410 | aC1.D1(aC1.FirstParameter(), p1, v1); |
| 411 | aC2.D1(aC2.FirstParameter(), p2, v2); |
| 412 | if (aEdge1.Orientation() == TopAbs_REVERSED) v1.Reverse(); |
| 413 | if (aEdge2.Orientation() == TopAbs_REVERSED) v2.Reverse(); |
| 414 | Standard_Real pr = v1 * v2; |
| 415 | if (pr > 0.) |
| 416 | aSecWire.Reverse(); |
| 417 | |
| 418 | getAISContext()->Erase(aIPrism); |
| 419 | Handle(AIS_InteractiveObject) aISecWire = drawShape (aSecWire,Quantity_NOC_GREEN,Standard_False); |
| 420 | Handle(Prs3d_LineAspect) aLA = |
| 421 | new Prs3d_LineAspect(Quantity_NOC_GREEN,Aspect_TOL_SOLID,3.); |
| 422 | aISecWire->Attributes()->SetWireAspect(aLA); |
| 423 | getAISContext()->Display(aISecWire); |
| 424 | if (WAIT_A_SECOND) return; |
| 425 | |
| 426 | // split myShell by aSecWire and compose the left side subshell |
| 427 | TopoDS_Shell aNewShell; |
| 428 | if (!splitAndComposeLeft(aSecAlgo, aSecWire, aNewShell, aText)) |
| 429 | return; |
| 430 | |
| 431 | drawShape (aNewShell); |
| 432 | getAISContext()->Erase(aIShell); |
| 433 | getAISContext()->Erase(aISecWire); |
| 434 | } |